Valid-env allows you to specify the environment variables that are required, those that are optional, and those that depend on one another, and will throw a useful error message immediately if something is missing.

Extension to ActiveModel for validating hostnames

VAT Identification Number data object and validator

VAT-ID validator based on ActiveModel::EachValidator

Vat number validator for Rails 3+ using vatlayer.com API

A Ruby wrapper library for veritrans Air Direct API

This Gem acts as an API Client for the VersaCommerce Theme API.

Vesper Rails

Auto generating ActiveModel validations for hashes

Interface for Pure-FTPd

It provides validation of URIs (URLs) to ActiveModel records and ActionControllers in Rails 3.

Concerns to help manage attributes in View Components

A ViewComponent extension that adds a `prop` DSL with defaults, fallbacks, required props, casting, enum validation, custom validators, and a pluggable caster registry. Patches ViewComponent::Base via a Rails Railtie (or on require outside Rails) so components accept a props hash out of the box.

Rails compatible view models

ViewSpec helps you develop, test and document the view layer of your Rails app using example-led specifications written in an expressive Ruby DSL.

Generates and validates Finnish national reference numbers (viitenumero).

Vim Script Package Manager based on pathogen.vim by Tim Pope

Provides VIN number validator for ActiveModel

Virgola is a CSV to object mapper.

This application is the generic base to handle elements like servers, users, and sessions.